Transmission power control on a wireless communication device for a plurality of regulated bands or component carriers

ABSTRACT

A wireless communication device is configured for performing uplink transmission power control. The wireless communication device includes a processor and instructions stored in memory. The wireless communication device performs uplink transmission power control for multiple regulated frequency bands or component carriers. The wireless communication device determines a total transmission power for at least one component carrier and allocates transmission power to at least one antenna.

RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.12/688,880 entitled “TRANSMISSION POWER CONTROL ON A WIRELESSCOMMUNICATION DEVICE FOR A PLURALITY OF REGULATED BANDS OR COMPONENTCARRIERS,” filed Jan. 16, 2010, which is a continuation-in-part of U.S.patent application Ser. No. 12/572,563 entitled “Antenna Port Mode andTransmission Mode Transitions,” filed Oct. 2, 2009, which are herebyincorporated by reference in their entirety.

TECHNICAL FIELD

The present disclosure relates generally to wireless communicationsystems. More specifically, the present disclosure relates to performinguplink transmission power control on a wireless communication device forantenna port mode and transmission mode transitions.

BACKGROUND

Wireless communication systems have become an important means by whichmany people worldwide have come to communicate. A wireless communicationsystem may provide communication for a number of wireless communicationdevices, each of which may be serviced by a base station.

A wireless communication device is an electronic device that may be usedfor voice and/or data communication over a wireless communicationsystem. A wireless communication device may alternatively be referred toas a mobile station, a user equipment, an access terminal, a subscriberstation, a mobile terminal, a remote station, a user terminal, aterminal, a subscriber unit, a mobile device, etc. A wirelesscommunication device may be a cellular phone, a smartphone, a personaldigital assistant (PDA), a wireless modem, etc.

A base station is a fixed station (i.e., a wireless communicationstation that is installed at a fixed location) that communicates withwireless communication devices. A base station may alternatively bereferred to as an access point, a Node B, an evolved Node B (eNB), orsome other similar terminology.

The 3rd Generation Partnership Project, also referred to as “3GPP,” is acollaboration agreement that aims to define globally applicabletechnical specifications and technical reports for third and fourthgeneration wireless communication systems. The 3GPP may definespecifications for the next generation mobile networks, systems, anddevices.

3GPP Long Term Evolution (LTE) is the name given to a project to improvethe Universal Mobile Telecommunications System (UMTS) mobile phone ordevice standard to cope with future requirements. In one aspect, UMTShas been modified to provide support and specification for the EvolvedUniversal Terrestrial Radio Access (E-UTRA) and Evolved UniversalTerrestrial Radio Access Network (E-UTRAN). LTE-Advanced (LTE-A) is thenext generation of LTE.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a wireless communication system that includes awireless communication device in wireless electronic communication witha base station;

FIG. 2 illustrates a first example of how a wireless communicationdevice may transition between antenna port modes and transmission modes;

FIG. 3 illustrates a second example of how a wireless communicationdevice may transition between antenna port modes and transmission modes;

FIG. 4 illustrates an example showing how a wireless communicationdevice may implicitly notify a base station about an autonomoustransition from multiple antenna port mode to single antenna port mode;

FIG. 5 illustrates another example showing how a wireless communicationdevice may implicitly notify a base station about an autonomoustransition from multiple antenna port mode to single antenna port mode;

FIG. 6 illustrates a method whereby a wireless communication devicetransitions from multiple antenna port mode to single antenna port modebased on radio resource control (RRC) signaling;

FIG. 7 illustrates a method whereby a wireless communication devicetransitions from single antenna port mode to multiple antenna port modebased on RRC signaling;

FIG. 8 illustrates a method whereby a wireless communication device mayattempt to return to single antenna port mode after a defined timeperiod;

FIG. 9 illustrates a method whereby a wireless communication device maystop the autonomous transition to single antenna port mode under certaincircumstances;

FIG. 10 illustrates a method whereby a base station may reallocateresources after it detects that a wireless communication device hasautonomously transitioned from multiple antenna port mode to singleantenna port mode;

FIG. 11 illustrates a method whereby a base station may scheduletime/frequency resources and instruct modulation and coding schemelevels after it detects that a wireless communication device hasautonomously transitioned from multiple antenna port mode to singleantenna port mode;

FIG. 12 illustrates a method whereby a base station may configure awireless communication device to transition from multiple antenna portmode to single antenna port mode via RRC signaling;

FIG. 13 illustrates another method whereby a base station may configurea wireless communication device to transition from multiple antenna portmode to single antenna port mode via RRC signaling;

FIG. 14 illustrates a method whereby a base station may configure awireless communication device to transition from single antenna portmode to multiple antenna port mode via RRC signaling;

FIG. 15 illustrates another method whereby a base station may configurea wireless communication device to transition from single antenna portmode to multiple antenna port mode via RRC signaling;

FIG. 16 illustrates a method whereby a base station may configure awireless communication device to transition from single antenna portmode to multiple antenna port mode and then subsequently detect that thewireless communication device has autonomously transitioned back tosingle antenna port mode;

FIG. 17 illustrates an uplink power control procedure;

FIG. 18 illustrates additional details about one aspect of the uplinkpower control procedure illustrated in FIG. 17;

FIG. 19 illustrates additional details about another aspect of theuplink power control procedure illustrated in FIG. 17;

FIG. 20 illustrates an example of transmission power allocation beforethe step of determining whether to drop physical channels is performed;

FIG. 21 illustrates an example of transmission power allocation afterthe step of determining whether to drop physical channels is performed;

FIG. 22 illustrates an example of transmission power allocation for thetwo 20 dBm power amplifier configuration case;

FIG. 23A illustrates an example of transmission power allocation for thefour 17 dBm PA configuration case;

FIG. 23B is a diagram illustrating one example of a plurality ofregulated frequency bands and component carriers;

FIG. 23C is a flow diagram illustrating one configuration of a methodfor performing uplink transmission power control for a plurality ofregulated frequency bands;

FIG. 23D is a diagram illustrating another example of a plurality ofregulated frequency bands and component carriers;

FIG. 23E is a diagram illustrating yet another example of a plurality ofregulated frequency bands and component carriers;

FIG. 23F is a flow diagram illustrating another configuration of amethod for performing uplink transmission power control for a pluralityof regulated frequency bands;

FIG. 23G is a flow diagram illustrating a configuration of a method forperforming uplink transmission power control for a plurality ofcomponent carriers;

FIG. 23H is a block diagram illustrating one configuration of a wirelesscommunication device in which systems and methods for performing uplinktransmission power control on a wireless communication device forantenna port mode and transmission mode transitions may be implemented;

FIG. 23I is a flow diagram illustrating a configuration of a method forperforming uplink transmission power control on a wireless communicationdevice for antenna port mode and transmission mode transitions;

FIG. 24 illustrates an open-loop transmission diversity schemeimplemented as frequency selective transmission diversity (FSTD);

FIG. 25 illustrates an open-loop transmission diversity schemeimplemented as space-frequency block coding (SFBC);

FIG. 26 illustrates an open-loop transmission diversity schemeimplemented as cyclic delay diversity (CDD);

FIG. 27A illustrates an example of an antenna port weighting process;

FIG. 27B illustrates another example of an antenna port weightingprocess;

FIG. 28 illustrates one way that a base station can configure an antennaport weighting process parameter (x) to be used at the wirelesscommunication device;

FIG. 29 illustrates an example showing how a wireless communicationdevice may notify a base station that it has overwritten an antenna portweighting process parameter (x);

FIG. 30 illustrates another example showing how a wireless communicationdevice may notify a base station that it has overwritten an antenna portweighting process parameter (x);

FIG. 31 illustrates another example showing how a wireless communicationdevice may notify a base station that it has overwritten an antenna portweighting process parameter (x);

FIG. 32 illustrates various components that may be utilized in awireless communication device; and

FIG. 33 illustrates various components that may be utilized in a basestation.

DETAILED DESCRIPTION

A wireless communication device configured for performing uplinktransmission power control on a wireless communication device isdisclosed. The wireless communication device includes a processor andinstructions stored in memory. The wireless communication deviceperforms uplink transmission power control for multiple regulatedfrequency bands or component carriers. A total transmission power for atleast one component carrier is determined. Transmission power isallocated to each antenna.

The wireless communication device may use a single power amplifier tosupport more than one UE power class. Alternatively, multiple poweramplifiers may support a single UE power class.

The wireless communication device may use a single power amplifier forthe plurality of regulated frequency bands or component carriers.Alternatively, each of the plurality of regulated frequency bands orcomponent carriers may use a separate power amplifier.

In another configuration, the wireless communication device may use asingle power amplifier for two or more but not all of the plurality ofregulated frequency bands or component carriers.

The wireless communication device may perform the uplink transmissionpower control separately for each of the plurality of regulated bands orcomponent carriers.

Multiple User Equipment (UE) power classes may be supported by thewireless communication device. In one configuration, a separate UE powerclass is set for each of the plurality of regulated frequency bands orcomponent carriers.

The wireless communication device may send a report to the base station.The report includes a number of UE power classes supported by thewireless communication device and an identification of each of the UEpower classes supported.

The wireless communication device may store and apply at least one UEconfiguration set. The UE configuration set may include at least one setof UE power classes. The power classes may be organized into UEcategories, UE capabilities and/or UE classes.

A method for performing uplink transmission power control on a wirelesscommunication device is disclosed. The wireless communication device mayperform uplink transmission power control for multiple regulatedfrequency bands or component carriers. The uplink transmission powercontrol is performed by determining a total transmission power for atleast one component carrier and allocating transmission power to atleast one antenna.

A computer-readable medium including instructions for performing uplinktransmission power control on a wireless communication device isdisclosed. The instructions are executed to perform uplink transmissionpower control for multiple regulated frequency bands or componentcarriers. Uplink transmission power control is performed by determininga total transmission power for at least one component carrier andallocating transmission power to at least one antenna.

At least some aspects of the systems and methods disclosed herein willbe described in relation to the 3GPP LTE and LTE-Advanced standards(Release-8 and Release-10). However, the scope of the present disclosureshould not be limited in this regard. At least some aspects of thesystems and methods disclosed herein may be utilized in other types ofwireless communication systems.

In 3GPP specifications, a wireless communication device is typicallyreferred to as a User Equipment (UE), and a base station is typicallyreferred to as a Node B or an evolved Node B (eNB). However, the scopeof the present disclosure should not be limited to the 3GPP standards.Thus, the terms “UE” and “wireless communication device” may be usedinterchangeably herein to mean the more general term “wirelesscommunication device.” Furthermore, the terms “base station” and “eNB”may be used interchangeably herein to mean the more general term “basestation.” The term “communication device” may be used to denote either awireless communication device or a base station.

FIG. 1 illustrates a wireless communication system 100 in which at leastsome of the methods disclosed herein may be utilized. The system 100includes a base station 102 in wireless electronic communication with awireless communication device 104. Communication between the basestation 102 and the wireless communication device 104 may occur inaccordance with the LTE-Advanced standards. The wireless communicationdevice 104 may include multiple antennas 106 a, 106 b.

There may be several uplink physical channels that exist between thewireless communication device 104 and the base station 102. The physicalchannels may include the physical uplink shared channel (PUSCH) 108, thephysical uplink control channel (PUCCH) 110 and the channel on which issent the sounding reference signal (SRS) 112.

The wireless communication device 104 may have at least two antenna portmodes 114 and several physical channels' transmission modes 116. Theantenna port modes 114 may include a single antenna port mode 114 a anda multiple antenna port mode 114 b. The transmission modes 116 mayinclude a single antenna transmission mode 116 a, a transmit diversitymode 116 b, an SU-MIMO (rank 1) mode 116 c, an SU-MIMO (rank 2 orhigher) mode 116 d and an MU-MIMO mode 116 e. (SU-MIMO stands forsingle-user, multiple-input-multiple-output, and MU-MIMO stands formultiple-user, multiple-input-multiple-output)

At any given time, the wireless communication device 104 may be inexactly one antenna port mode 114 and exactly one transmission mode 116.A combination of an antenna port mode 114 and a transmission mode 116may be considered to be a transmission state.

To save battery life or take advantage of spatial resourcesappropriately, the wireless communication device 104 should be able totransition between the antenna port modes 114 and the transmission modes116. At least some aspects of the systems and methods disclosed hereinrelate to defining consistent behavior for transitioning between thesemodes 114, 116.

In order for reliable communication to occur between the wirelesscommunication device 104 and the base station 102, the base station 102should be aware of the antenna port mode 114 in which the wirelesscommunication device 104 is currently operating. If the wirelesscommunication device 104 changes its antenna port mode 114 (and thuschanges its transmission state) without signaling from the base station102 (referred to as “autonomously” changing its antenna port mode 114),the base station 102 should adjust its receiver and its schedulingcharacteristics to adapt to the change in antenna port mode 114.Furthermore, in order for the wireless communication device 104 to beable to determine whether the base station 102 has received informationabout the wireless communication device's antenna port mode 114, it maybe useful to define a consistent behavior by the base station 102 uponits determination of a change in antenna port mode 114. At least someaspects of the methods disclosed herein relate to a state transitionmechanism that minimizes explicit signaling between the base station 102and the wireless communication device 104 when the wirelesscommunication device 104 changes its transmission state.

FIG. 2 illustrates a first example of how a wireless communicationdevice 104 may transition between antenna port modes 114 andtransmission modes 116. This example may be referred to as case one 218.Each transmission mode 116 may belong to single antenna port mode 114 aand/or multiple antenna port mode 114 b. For example, the single antennatransmission mode 116 a may belong to the single antenna port mode 114 aonly. The transmit diversity mode 116 b, the SU-MIMO mode (rank 1) 116 cand the MU-MIMO mode 116 e may belong to both single antenna port mode114 a and multiple antenna port mode 114 b. The SU-MIMO mode (rank 2 orhigher) 116 d may belong to the multiple antenna port mode 114 b only.

FIG. 3 illustrates a second example of how a wireless communicationdevice 104 may transition between antenna port modes 114 andtransmission modes 116. This example may be referred to as case two 320.In case two 320, single antenna transmission mode 116 a may belong tosingle antenna port mode 114 a only. Transmit diversity mode 116 b andSU-MIMO mode (rank 1) 116 c may belong to multiple antenna port mode 114b only. SU-MIMO mode (rank 2 or higher) 116 d may belong to multipleantenna port mode 114 b only. MU-MIMO mode 116 e may belong to bothsingle antenna port mode 114 a and multiple antenna port mode 114 b.

A wireless communication device 104 may autonomously transition from themultiple antenna port mode 114 b to the single antenna port mode 114 a.When this occurs, the wireless communication device 104 may implicitlynotify the base station 102 about the autonomous transition from themultiple antenna port mode 114 b to the single antenna port mode 114 a.

FIG. 4 illustrates an example showing how the wireless communicationdevice 104 may implicitly notify the base station 102 about theautonomous transition from the multiple antenna port mode 114 b to thesingle antenna port mode 114 a. The wireless communication device 104may utilize multiple antennas 106 a-b. When the wireless communicationdevice 104 is in the multiple antenna port mode 114 b, a multi-code 422a, 422 b SRS 112 may be sent out. When the wireless communication device104 transitions to the single antenna port mode 114 a (without anyexplicit signaling to the base station 102), the wireless communicationdevice 104 may send an SRS 112 with only one code 422 a. The basestation 102 may infer that the wireless communication device 104 hastransitioned to the single antenna port mode 114 a by detecting that thewireless communication device 104 has sent an SRS 112 with only one code422 a.

FIG. 5 illustrates another example showing how the wirelesscommunication device 104 may implicitly notify the base station 102about the autonomous transition from the multiple antenna port mode 114b to the single antenna port mode 114 a. The wireless communicationdevice 104 may utilize multiple antennas 106 a-b. When the wirelesscommunication device 104 is in the multiple antenna port mode 114 b, thePUCCH 110 may be sent out on multiple resource blocks (RBs) 524 a, 524b. When the wireless communication device 104 transitions to the singleantenna port mode 114 a (without any explicit signaling to the basestation 102), the wireless communication device 104 may use only one RB524 a to send the PUCCH 110.

The order of RB 524 priority for PUCCH 110 may be predefined. Forexample, in FIG. 5, lower frequency (or outside frequency) has a higherpriority. So lower RB 524 a (or outside RB 524 a) will be used when thewireless communication device 104 transitions to the single antenna portmode 114 a. In this case, no signaling is needed to inform the basestation 102 which RB 524 will be dropped when the wireless communicationdevice 104 transitions to the single antenna port mode 114 a.

Reference is now made to FIG. 6. The method 600 of FIG. 6 illustratesthat a wireless communication device 104 may be configured from themultiple antenna port mode 114 b to the single antenna port mode 114 avia radio resource control (RRC) signaling. More specifically, FIG. 6illustrates that a wireless communication device 104 may receive 602 RRCsignaling. In response to receiving 602 the RRC signaling, the wirelesscommunication device 104 may transition 604 to the single antenna portmode 114 a for one or more physical channels 108 (e.g., PUCCH 108, PUCCH110, SRS 112). If the wireless communication device 104 transitions tothe single antenna port mode 114 a, the wireless communication device104 may transmit the PUCCH 110 or the SRS 112 as shown in FIG. 4( b) or5(b).

The RRC signaling referred to in FIG. 6 might include the transmissionmode 116 for the PUSCH 108. An example will be described assuming thatthe wireless communication device 104 is configured according to casetwo 320 in FIG. 3 (in which the transmit diversity mode 116 b, theSU-MIMO mode (rank 1) 116 c and the SU-MIMO mode (rank 2) 116 d belongto the multiple antenna port mode 114 b, and the single antennatransmission mode 116 a belongs to the single antenna port mode 114 a).When a wireless communication device 104 receives a PUSCH transmissionmode RRC signal that indicates the transition to the single antennatransmission mode 116 a during transmit diversity mode 116 b, SU-MIMOmode (rank 1) 116 c or SU-MIMO mode (rank 2) 116 d, the wirelesscommunication device 104 may transition from the multiple antenna portmode 114 b to the single antenna port mode 114 a for one or morephysical channels.

Alternatively, the RRC signaling referred to in FIG. 6 might include theantenna port mode 114. When a wireless communication device 104 receivesan indication that the antenna port mode 114 should be the singleantenna port mode 114 a, the wireless communication device 104 maytransition to the single antenna port mode 114 a for one or morephysical channels.

Reference is now made to FIG. 7. The method 700 of FIG. 7 illustratesthat a wireless communication device 104 may be configured from thesingle antenna port mode 114 a to the multiple antenna port mode 114 bvia RRC signaling. More specifically, FIG. 7 illustrates that a wirelesscommunication device 104 may receive 702 RRC signaling. In response toreceiving 702 the RRC signaling, the wireless communication device 104may transition 704 to the multiple antenna port mode 114 b for one ormore physical channels 108 (e.g., PUSCH 108, PUCCH 110, SRS 112). If thewireless communication device 104 transitions to the multiple antennaport mode 114 b, the wireless communication device 104 may transmit thePUCCH 110 or the SRS 112 as shown in FIG. 4( a) or 5(a).

The RRC signaling referred to in FIG. 7 might include the transmissionmode 116 for the PUSCH 108. An example will be described assuming thatthe wireless communication device 104 is configured according to casetwo 320 in FIG. 3. When a wireless communication device 104 receives aPUSCH transmission mode RRC signal that indicates the transition fromthe single antenna transmission mode 116 a to the transmit diversitymode 116 b, the SU-MIMO mode (rank 1) 116 c or the SU-MIMO mode (rank 2)116 d, the wireless communication device 104 may transition from thesingle antenna port mode 114 a to the multiple antenna port mode 114 bfor one or more physical channels (e.g., PUSCH 108, PUCCH 110, SRS 112).

Alternatively, the RRC signaling referred to in FIG. 7 might include theantenna port mode 114. When a wireless communication device 104 receivesan indication that the antenna port mode 114 should be the multipleantenna port mode 114 b, the wireless communication device 104 maytransition to the multiple antenna port mode 114 b for one or morephysical channels (e.g., PUSCH 108, PUCCH 110, SRS 112).

Reference is now made to FIG. 8. The method 800 of FIG. 8 illustratesthat a wireless communication device 104 may attempt to return to singleantenna port mode 114 a, after a defined time period (which is shown asT in FIG. 8). The time period may be known to both the wirelesscommunication device 104 and the base station 102 via either higherlayer signaling or as a class parameter for the wireless communicationdevice 104.

More specifically, when the wireless communication device 104 receives802 RRC signaling, the timer may be reset 804 and start to count. Thewireless communication device 104 may transition 806 to the multipleantenna port mode 114 b for one or more physical channels. When thewireless communication device 104 determines 808 that the timer hasexceeded the defined time period (T), then the wireless communicationdevice 104 autonomously returns 810 to the single antenna port mode 114a.

Reference is now made to FIG. 9. The method 900 of FIG. 9 illustrateshow the wireless communication device 104 may stop the autonomoustransition to the single antenna port mode 114 a under certaincircumstances. If the pattern of cycling between the base station's 102instruction to transition to the multiple antenna port mode 114 b andthe wireless communication device 104 autonomously transitioning to thesingle antenna port mode 114 a happens a certain number of times (whichmay be defined as a system parameter) during a certain time (which isshown as P in FIG. 9), then the wireless communication device 104 maycease to autonomously transition to the single antenna port mode 114 a.The wireless communication device 104 may restart the autonomoustransition to the single antenna port mode 114 a after a certain time(which is shown as Q in FIG. 9).

More specifically, the wireless communication device 104 may determine902 whether RRC signaling has been received. If it has, then thewireless communication device 104 may transition 904 to the multipleantenna port mode 114 b for one or more physical channels. In addition,the wireless communication device 104 may create 906 a time stamp “T1”.The wireless communication device 104 may then determine 908 whether N(which represents the number of times that the wireless communicationdevice 104 has autonomously transitioned to the single antenna port mode114 a) exceeds a defined limit, which is shown as “certain number oftimes” in FIG. 9. If not, the wireless communication device 104 mayautonomously return 910 to the single antenna port mode 114 a. Timestamp “T2” may be created 912. In addition, the wireless communicationdevice 104 may determine 914 whether T2−T1<P (where P represents adefined time period, as described above). If not, then the value of Nmay be reset 916, and the method 900 may return to step 902 and continueas described above.

If in step 908 it is determined that N does exceed the defined limit,then the method may return to step 902 (without returning 910 to thesingle antenna port mode 114 a) and continue as described above. If instep 914 it is determined that T2−T1 is less than P, then the method 900may return to step 902 (without resetting 914 N) and continue asdescribed above. If in step 902 it is determined that RRC signaling hasnot been received, then the wireless communication device 104 may create918 a time stamp “T3”. The value of N may be reset 920 if T3−T1>Q (whereQ represents a defined time period, as described above). The method 900may then proceed to step 908, and continue as described above.

The base station 102 may detect the wireless communication device's 104autonomous transition from the multiple antenna port mode 114 b to thesingle antenna port mode 114 a. For example, suppose that the basestation 102 allocates multiple (e.g., two or four) codes 422 for thewireless communication device 104 in the multiple antenna port mode 114b. If the base station 102 detects that the SRS 112 was sent out on onlyone code 422 a (as shown in FIG. 4( b)) even though the information atthe base station 102 indicates that the wireless communication device104 is in multiple antenna port mode 114 b, the base station 102 mayconsider that the wireless communication device 104 has autonomouslytransitioned from the multiple antenna port mode 114 b to the singleantenna port mode 114 a.

As another example, suppose that the base station 102 allocates multiple(e.g., two) RBs 524 for the wireless communication device 104 in themultiple antenna port mode 114 b. If the base station 102 detects thatthe wireless communication device 104 is using only one RB 524 a forPUCCH 110 (as shown in FIG. 5( b)) even though the information at thebase station 102 indicates that the wireless communication device 104 isin multiple antenna port mode 114 b, the base station 102 may considerthat the wireless communication device 104 has autonomously transitionedfrom the multiple antenna port mode 114 b to the single antenna portmode 114 a.

Reference is now made to FIG. 10. The method 1000 of FIG. 10 illustratesthat once the base station 102 detects 1002 that a first wirelesscommunication device 104 has autonomously transitioned from the multipleantenna port mode 114 b to the single antenna port mode 114 a, the basestation 102 may change 1004 the first wireless communication device's104 status to single antenna port mode 114 a and reallocate 1006 thepart of the resources that are no longer being used by the firstwireless communication device 104 to a second wireless communicationdevice 104. For example, code #2 422 b in FIG. 4 and/or RB #2 524 b inFIG. 5 for the first wireless communication device 104 may bereallocated to the second wireless communication device 104 without anysignaling to the first wireless communication device 104.

Reference is now made to FIG. 11. The method 1100 of FIG. 11 illustratesthat once the base station 102 detects 1102 that a first wirelesscommunication device 104 has autonomously transitioned from multipleantenna port mode 114 b to single antenna port mode 114 a, the basestation 102 may change 1104 the status of the first wirelesscommunication device 104 to single antenna port mode 114 a. The basestation 102 may schedule 1106 time/frequency resources and instructmodulation and coding scheme levels assuming that single input singleoutput transmission (which implied by single antenna port mode 114 a)were to be executed by the wireless communication device 104, unless anduntil the base station 102 determines to change the wirelesscommunication device's 104 antenna port mode 114 from single 114 a tomultiple 114 b, for objectives determined by its scheduling algorithm(e.g., revenue, capacity, optimization or other such measures).

The base station 102 may configure the wireless communication device 104to transition from multiple antenna port mode 114 b to single antennaport mode 114 a via RRC signaling. The RRC signaling might include thePUSCH transmission mode. For example, referring to the method 1200 shownin FIG. 12, the base station 102 may inform 1202 a first wirelesscommunication device 104 to transition to single antenna transmissionmode 116 a by using the PUSCH transmission mode parameter in RRCsignaling. Then, the base station 102 may change 1204 the first wirelesscommunication device's 104 status to single antenna port mode 114 a andreallocate 1206 the part of resources that are no longer being used bythe first wireless communication device 104 to a second wirelesscommunication device 104.

Alternatively, referring to the method 1300 shown in FIG. 13, anexplicit antenna port mode parameter may be configured via RRCsignaling. The base station 102 may change 1302 the status of the firstwireless communication device 104 to single antenna port mode 114 a. Thebase station 102 may also configure 1304 the first wirelesscommunication device's 104 antenna port mode 114 to single antenna portmode 114 a by using an antenna port parameter via RRC signaling. Oncethe base station changes 1302 the first wireless communication device's104 status, the base station 102 may reallocate 1306 the part of theresources that are no longer being used by the first wirelesscommunication device 104 to a second wireless communication device 104.

The base station 102 may configure the wireless communication device 104to transition from single antenna port mode 114 a to multiple antennaport mode 114 b via RRC signaling. For example, assuming case two 320 asillustrated in FIG. 3, the base station 102 may inform the wirelesscommunication device 104 to transition to transmit diversity mode 116 bor SU-MIMO mode (rank 1) 116 c by using a PUSCH transmission modeparameter in RRC signaling.

Referring to the method 1400 illustrated in FIG. 14, the base station102 may reallocate 1402 a second wireless communication device's 104resources to a first wireless communication device 104. For example,code #2 422 b in FIG. 4 and/or RB #2 524 b in FIG. 5 may be reallocated1402 to the first wireless communication device 104. Then, the basestation 102 may change 1404 the status of the first wirelesscommunication device 104 to multiple antenna port mode 114 b, and thebase station 102 may instruct 1406 the wireless communication device 104to transition to transmit diversity mode 116 b or SU-MIMO mode (rank 1)116 c by using a PUSCH transmission mode parameter in RRC signaling.

Alternatively, assuming case one 218 as illustrated in FIG. 2 (wheretransmit diversity mode 116 b and SU-MIMO mode (rank 1) 116 c belong toboth multiple antenna port mode 114 b and single antenna port mode 114a), an explicit antenna port mode parameter may be configured via RRCsignaling. Referring to the method 1500 illustrated in FIG. 15, the basestation 102 may reallocate 1502 a second wireless communication device's104 resources to a first wireless communication device 104. For example,code #2 422 b in FIG. 4 and/or RB #2 524 b in FIG. 5 may be reallocated1502 to the first wireless communication device 104. Then, the basestation 102 may change 1504 the status of the first wirelesscommunication device 104 to multiple antenna port mode 114 b, and thebase station 102 may instruct 1506 the first wireless communicationdevice 104 to transition to multiple antenna port mode 114 b by usingthe antenna port mode parameter in RRC signaling.

In the cases where the wireless communication device 104 returns to asingle antenna port mode 114 a following instruction from the basestation 102 to transition to multiple antenna port mode 114 b, the basestation 102 may schedule time/frequency resources and instructmodulation and coding scheme levels assuming single input single outputtransmission were to be executed by the wireless communication device104. This may continue until the base station 102 determines to changethe wireless communication device's 104 antenna port mode 114 fromsingle 114 a to multiple 114 b, at which point the base station 102 mayre-send an RRC command to re-establish multiple antenna port mode 114 b.

Referring to the method 1600 illustrated in FIG. 16, the base station102 may reallocate 1602 resources from a second wireless communicationdevice 104 to a first wireless communication device 104. Then, the basestation 102 may change 1604 the status of the first wirelesscommunication device 104 to multiple antenna port mode 114 b, and thebase station 102 may instruct 1606 the first wireless communicationdevice 104 to transition to multiple antenna port mode 114 b by usingthe antenna port mode parameter in RRC signaling. When the wirelesscommunication device's 104 autonomous transition to single antenna portmode 114 a is detected 1608, the method 1600 may return to step 1604 andcontinue as described above.

Another aspect of the systems and methods disclosed herein relates touplink transmit power control for supporting multiple antennatransmission modes and multiple physical channels. Referring to themethod 1700 illustrated in FIG. 17, an uplink power control proceduremay include two steps. The first step is defining 1702 the totaltransmission power for each component carrier (CC). The second step isdefining 1704 how to allocate the transmission power to each antenna106. The wireless communication device 104 may perform both the firststep 1702 and the second step 1704. The base station 102 may onlyperform the first step 1702. The second step 1704—allocation oftransmission power to each antenna 106—may be different depending onwhether the wireless communication device 104 is in the single antennaport mode 114 a or the multiple antenna port mode 114 b, and it maydepend on the power amplifier (PA) configuration.

FIG. 18 illustrates the details of step one 1702 (i.e., defining thetotal transmission power for each CC). As shown in FIG. 18, step one1702 may include two sub-steps 1802, 1804. The first sub-step is todetermine 1802 the total transmission power for each CC. The secondsub-step 1804 is to determine whether to drop any physical channel(s).In some cases, the second sub-step 1804 may be skipped.

The details of the first sub-step 1802 depend on the physical channel.For PUSCH 108, the transmission power for each CC may be defined byequation (1):

$\begin{matrix}{{P_{PUSCH}( {i,k} )} = {\min\begin{Bmatrix}{P_{MAX},{{{10 \cdot \log_{10}}{M_{PUSCH}( {i,k} )}} +}} \\{{P_{0{\_ PUSCH}}(k)} + {{\alpha(k)} \cdot {{PL}(k)}} +} \\{{\Delta_{TF}( {i,k} )} + {f( {i,k} )}}\end{Bmatrix}}} & (1)\end{matrix}$

Equation (1) is expressed in units of dBm. In equation (1), k is theuplink CC number, and i is the subframe number. P_(MAX) is the totalmaximum allowed power. M_(PUSCH) (i,k) is the number of, contiguous ornon-contiguous, PRBs in UL CC k. P₀ _(—) _(PUSCH)(k) is the sum ofcell-specific (P_(O) _(—) _(NOMINAL) _(—) _(PUSCH)(k)) and wirelesscommunication device-specific (P_(O) _(—) _(UE) _(—) _(PUSCH)(k))components. α(k) is the fractional TPC cell-specific parameter for UL CCk with 0≦α(k)≦1. PL(k) is the downlink path-loss estimate for downlinkCC The expression Δ_(TF)(i,k)=10·log₁₀(2^(K) ^(s) ^((k)·TBS(i,k)/N)^(RE) ^((i,k))−1) where K_(s)(k)=0 or 1.25, TBS (i,k) is the TB size,and N_(RE)(i,k)=M_(PUSCH)(i,k)·N_(sc) ^(RB)·N_(symb) ^(PUSCH)(i,k) Theexpression f(i,k)=f(i−1,k)+δ_(PUSCH)(i,k) is the function accumulatingthe CL TPC command δ_(PUSCH)(i,k) during sub-frame i with f(0,k) beingthe first value after reset of accumulation.

For PUCCH 110, the transmission power for each CC may be defined byequation (2):

$\begin{matrix}{{P_{PUCCH}( {i,k} )} = {\min\begin{Bmatrix}{P_{MAX},{{{10 \cdot \log_{10}}{M_{PUCCH}( {i,k} )}} +}} \\{{P_{0{\_ PUCCH}}(k)} + {{PL}(k)} +} \\{{h( \cdot )} + {\Delta_{F\_ PUCCH}(F)} + {g( {i,k} )}}\end{Bmatrix}}} & (2)\end{matrix}$

Equation (2) is expressed in units of dBm. In equation (2), k is theuplink CC number, and i is the subframe number. M_(PUCCH)(i,k) is thenumber of orthogonal resources allocated for PUCCH in UL CC k. P₀ _(—)_(PUCCH) (k) is the sum of cell-specific (P_(O) _(—) _(NOMINAL) _(—)_(PUCCH)(k)) and wireless communication device-specific (P_(O) _(—)_(UE) _(—) _(PUCCH)(k)) components. PL(k) is the estimated path loss inUL k. The expression h(•) is a PUCCH format dependent value. Theexpression Δ_(F) _(—) _(PUCCH)(F) corresponds to PUCCH format (F),relative to format 1 a. The expression g(i,k) is the functionaccumulating the CL TPC commands in CC k.

The orthogonal resources for PUCCH may mean orthogonal code andfrequency resources which are allocated for a specific wirelesscommunication device. Orthogonal codes include Zadoff-Chu sequences andorthogonal covering (e.g., Walsh code). Frequency resources meansresource blocks, in the parlance of 3GPP LTE Release 8. Therefore, iftwo different Zadoff-Chu sequences and the same RB were allocated for awireless communication device, it may be said that two orthogonalresources are allocated for the wireless communication device. If thesame Zadoff-Chu sequence and two different RBs were allocated for awireless communication device, it may be said that two orthogonalresources are allocated for the wireless communication device.

In another example, for PUCCH 110, the transmission power for each CCmay be defined by equation (2-1):

$\begin{matrix}{{P_{PUCCH}( {i,k} )} = {\min\begin{Bmatrix}{P_{MAX},{{P_{0{\_ PUCCH}}(k)} + {{PL}(k)} +}} \\{{h( \cdot )} + {\Delta_{F\_ PUCCH}(F)} + {g( {i,k} )}}\end{Bmatrix}}} & ( {2\text{-}1} )\end{matrix}$

Equation (2-1) is expressed in units of dBm. In equation (2-1), k is theuplink CC number, and i is the subframe number. P₀ _(—) _(PUSCH)(k) isthe sum of cell-specific (P_(O) _(—) _(NOMINAL) _(—) _(PUCCH)(k)) andwireless communication device-specific (P_(O) _(—) _(UE) _(—)_(PUCCH)(k)) components. PL(k) is the estimated path loss in UL k. Theexpression h(•) is a PUCCH format-dependent value. The expression Δ_(F)_(—) _(PUCCH)(F) corresponds to PUCCH format (F), relative to format 1a. The expression g(i,k) is the function accumulating the CL TPCcommands in CC k.

For SRS 112, the transmission power for each CC may be defined byequation (3):

$\begin{matrix}{{P_{SRS}( {i,k} )} = {\min\begin{Bmatrix}{P_{MAX},{{P_{SRS\_ OFFSET}(k)} +}} \\{{{10 \cdot \log_{10}}{M_{SRS}(k)}} + {P_{0{\_ PUSCH}}(k)} +} \\{{{\alpha(k)} \cdot {{PL}(k)}} + {f( {i,k} )}}\end{Bmatrix}}} & (3)\end{matrix}$

Equation (3) is expressed in units of dBm. In equation (3), k is theuplink CC number, and i is the subframe number. P_(SRS) _(—)_(OFFSET)(k) is a wireless communication device-specific parameter.M_(SRS)(k) is the SRS transmission bandwidth, in PRBs, in uplink CC k.The remaining parameters are as defined for PUSCH transmission in UL CCk.

Referring to FIG. 19, the details of the second sub-step 1804 (i.e.,determining how to drop physical channel(s)) are illustrated. Theprojected transmission power and the maximum transmission power may becompared 1902. If the projected transmission power is smaller than themaximum transmission power, then the method may proceed to step two1704. Otherwise, the physical channel is dropped 1904 based on thepredefined priority. Then the method returns to comparing 1902 theprojected transmission power and the maximum transmission power.

For purposes of comparing 1902 the projected transmission power and themaximum transmission power, the definition of “projected transmissionpower” may be as follows.

$\begin{matrix}{{{Projectedtransmissionpower}\mspace{11mu}( {i,n_{ns},l} )} = {\sum\limits_{k}\begin{Bmatrix}{{{n_{PUSCH}( {i,n_{ns},l,k} )} \cdot {P_{PUSCH}( {i,k} )}} + {{n_{PUCCH}( {i,n_{ns},l,k} )} \cdot}} \\{{P_{PUCCH}( {i,k} )}{{n_{SRS}( {i,n_{ns},l,k} )} \cdot {P_{SRS}( {i,k} )}}}\end{Bmatrix}}} & (4)\end{matrix}$

The maximum transmission power may be defined by the total transmissionpower. The maximum transmission power may be defined by the power classof the wireless communication device 104 (which may be constrained bygovernment regulations). For example, the maximum transmission power maybe 23 dBm, 21 dBm, 25 dBm, etc.

In equation (4), n_(PUSCH), n_(PUCCH) and n_(SRS) stand for thefollowing. The expression n_(PUSCH) (i,n_(ns),l,k)=1 if PUSCH 108 isallocated on a specific symbol (on ith subframe, n_(ns) slot, lth symboland kth component carrier). The expression n_(PUSCH)(i,n_(ns),l,k)=0 ifPUSCH 108 is not allocated on a specific symbol (on ith subframe, n_(ns)slot, lth symbol and kth component carrier). The expressionn_(PUCCH)(i,n_(ns),l,k)=1 if PUCCH 110 is allocated on a specific symbol(on ith subframe, n_(ns) slot, lth symbol and kth component carrier).The expression n_(PUCCH)(i,n_(ns),l,k)=0 if PUCCH 110 is not allocatedon a specific symbol (on ith subframe, n_(ns) slot, lth symbol and kthcomponent carrier). The expression n_(PUSCH)(i,n_(ns),l,k)=1 if SRS 112is allocated on a specific symbol (on ith subframe, n_(ns) slot, lthsymbol and kth component carrier). The expressionn_(PUSCH)(i,n_(ns),l,k)=0 if SRS 112 is not allocated on a specificsymbol (on ith subframe, n_(ns) slot, lth symbol and kth componentcarrier).

The predefined order of the physical channel priority may be as follows.In general, the order could be any permutation of the physical channelsor as determined by base station scheduling and control. In one example,PUCCH low frequency>>>PUCCH high frequency>PUSCH low frequency>>PUSCHhigh frequency. In another example, PUCCH low frequency>>PUSCH lowfrequency>>PUCCH high frequency>>PUSCH high frequency In anotherexample, PUCCH low frequency>>>PUCCH high frequency>SRS lowfrequency>>SRS high frequency. In another example, PUCCH lowfrequency>>>PUCCH high frequency>SRS low frequency>>SRS highfrequency>>>PUSCH low frequency>>PUSCH high frequency. In anotherexample, SRS low frequency<<PUCCH low frequency<<PUSCH lowfrequency<<SRS high frequency<<PUCCH high frequency<<PUSCH lowfrequency>>PUSCH high frequency. Based on this order, some physicalchannels may be dropped until the projected transmission power becomesless than the maximum transmission power. One example is shown in FIGS.20 and 21. FIG. 20 illustrates the transmission power allocation beforethe step of determining 1804 whether to drop physical channels isperformed. FIG. 21 illustrates the transmission power allocation afterthis step 1804 is performed.

If the uplink power control procedure described above is applied, thebase station 102 can ignore the power amplifier (PA) configuration ofthe wireless communication device 104 for purposes of power control,even though each wireless communication device 104 may have a differentPA configuration. In other words, power control can be independent ofthe PA configuration. Therefore, less signaling is required in thetransition between single antenna port mode 114 a and multiple antennaport mode 114 b. Also, since there is a common power control equationbetween single antenna port mode 114 a and multiple antenna port mode114 b, there may not be a rapid power change between them.

A wireless communication device may have both step one 1702 and step two1704 in its uplink power control procedure. The base station 102 mayhave only step one 1702 in its uplink power control procedure. The basestation 102 can ignore the PA configuration and the antenna port mode114 of the wireless communication device 104 in its uplink power controlprocedure.

In single antenna port mode 114 a, depending on the PA configuration,allocation of transmission power is different between the antennas 106a, 106 b. For example, in the two or four 23 dBm PA configuration case,single antenna port mode 114 a may use only one PA physically. In otherwords, the same transmission power as shown in FIG. 21 for one antenna106 a will be allocated. For the remaining antenna 106 b, no power willbe allocated. In the two 20 dBm PA configuration case, single antennaport mode 114 a may use two PAs physically and the allocatedtransmission power for each antenna 106 a, 106 b may be as shown in FIG.22. In the four 17 dBm PA configuration case, the single antenna portmode 114 a may use two PAs physically and the allocated transmissionpower for each antenna 106 may be as shown in FIG. 23A. In multipleantenna port mode 114 b, for the two antenna 106 a, 106 b case, one-halfof the transmission power may be allocated to each antenna 106, as shownin FIG. 22. One-quarter of the transmission power may be allocated toeach antenna 106 in the four antenna 106 case, as shown in FIG. 23A. Inthe example illustrated in FIG. 23A, K indicates that there a singlepower amplifier (PA) is used for both illustrated bands. That is, K hasa common value (i.e., K=1) across both bands.

FIG. 23B is a diagram illustrating one example of a plurality ofregulated frequency bands and component carriers. This diagramillustrates three component carriers 2302, 2304, 2306 and two frequency“chunks” or regulated frequency bands 2310, 2312 along a frequency scale2308. Component carrier 1 2302, component carrier 2 2304 and componentcarrier 3 2306 are indicated by k=1, k=2 and k=3 respectively. Componentcarrier 1 2302 and component carrier 2 2304 are located in regulatedband 1 2310. Component carrier 3 2306 is located in regulated band 22312 in a higher frequency 2308 range. For example, regulated band 12310 could be a frequency band in the 800 MHz range while regulated band2 2312 could be a frequency band in the 2 GHz range.

FIG. 23B also illustrates several examples of wireless communicationdevice configurations. In particular, several different power amplifierarrangements are shown. In these examples, K indicates different poweramplifiers. For example, power amplifier A (K=1) 2314 provides signalamplification for both regulated band 1 2310 and regulated band 2 2312.Thus, power amplifier A (K=1) 2314 provides signal amplification forcomponent carrier 1 2302, component carrier 2 2304 and component carrier3 2306. In other words, the wireless communication device 104 may beconfigured such that a single power amplifier provides signalamplification for all of the transmitted frequency bands.

In another configuration, power amplifier B (K=1) 2316 amplifiesregulated band 1 2310 (e.g., and hence, component carrier 1 2302 andcomponent carrier 2 2304) while power amplifier C (K=2) 2318 amplifiesregulated band 2 2312 (e.g., and component carrier 3 2306). Thus, thewireless communication device 104 may be configured such that a separatepower amplifier is provided for each regulated frequency band having oneor more component carriers (e.g., the wireless communication device mayinclude multiple power amplifiers).

In yet another configuration, a power amplifier may amplify separatecomponent carriers in different regulated frequency bands. For example,power amplifier E (K=2) 2322 may provide signal amplification forcomponent carrier 2 2304 (e.g., in regulated band 1 2310) and componentcarrier 3 2306 (e.g., in regulated band 2 2312). Power amplifier D (K=1)2320 may be provided for component carrier 1 2302.

In another configuration, separate power amplifiers may be provided foreach component carrier. In an example configuration, power amplifier F(K=1) 2324 provides signal amplification for component carrier 1 2302,while power amplifier G (K=2) 2326 amplifies component carrier 2 2304and power amplifier H (K=3) 2328 amplifies component carrier 3 2306.Thus, FIG. 23B illustrates that if each regulated band and/or componentcarrier uses separate power amplifiers indicated by separate K values,then each power amplifier provides signal amplification for eachregulated band and/or component carrier.

FIG. 23C is a flow diagram illustrating one configuration of a method2330 for performing uplink transmission power control for a plurality ofregulated frequency bands. In this configuration, the method illustratedin FIG. 17 is performed for multiple regulated bands. For example, awireless communication device 104 determines 2332 a a total transmissionpower for each component carrier (CC) which is indicated by K=1. Thewireless communication device 104 then allocates 2334 a transmissionpower to each antenna 106. This procedure may then repeat 2330 b forK=2. That is, for K=2, the wireless communication device 104 maydetermine 2332 b the total transmission power for each component carrier(CC) and then allocate 2334 b transmission power to each antenna 106.For more specificity, step 1 2332 a-b in FIG. 23C for each regulatedband or component carrier may be the same procedure that is carried outin step 1 1702 of FIG. 17. Step 2 2334 a-b in FIG. 23C may be the sameprocedure carried out in step 2 1704 of FIG. 17.

FIG. 23D is a diagram illustrating another example of a plurality ofregulated frequency bands and component carriers. In this example, fourcomponent carriers 2336, 2338, 2340, 2342 (k=1-4) and three regulatedbands 2346, 2348, 2350 are illustrated along a frequency scale 2344. Inthis case, component carrier 1 (k=1) 2336 and component carrier 2 (k=2)2338 are included in regulated band 1 2346. Regulated band 2 2348includes only component carrier 3 (k=3) 2340 and regulated band 3 2350includes only component carrier 4 (k=4) 2342. Regulated band 1 2346 maybe in an 800 MHz frequency range, regulated band 2 2348 may be in a 1.7GHz frequency range and regulated band 3 2350 may be in a 2 GHzfrequency range, for example.

In one configuration, power amplifier A (K=1) 2352 may be a single poweramplifier that provides signal amplification for all of the regulatedbands 2346, 2348, 2350 and hence, all of the component carriers (k=1-4)2336, 2338, 2340, 2342. In other configurations, multiple poweramplifiers may be used to power individual or multiple componentcarriers and/or regulated bands. For instance, power amplifier B (K=1)2354 may provide signal amplification for regulated band 1 2346 (i.e.,and hence, for component carrier 1 (k=1) 2336 and component carrier 2(k=2) 2338). Regulated band 2 2348 may use power amplifier C (K=2) 2356while regulated band 3 2350 uses power amplifier D (K=3) 2358.

In another configuration, a single power amplifier may provideamplification for multiple component carriers on separate regulatedfrequency bands. For example, power amplifier F (K=2) 2362 may be usedto amplify signals on component carrier 3 (k=3) 2340 and componentcarrier 4 (k=4) 2342, which are separated between regulated band 2 2348and regulated band 3 2350. Power amplifier E (K=1) 2360, for example,may be used to amplify regulated band 1 2346 (e.g., and thus componentcarrier 1 (k=1) 2336 and component carrier 2 (k=2) 2338).

In yet another configuration, a separate power amplifier may be used foreach individual component carrier. In this example, component carrier 1(k=1) 2336 uses power amplifier G (K=1) 2364, component carrier 2 (k=2)2338 uses power amplifier H (K=2) 2366, component carrier 3 (k=3) 2340uses power amplifier I (K=3) 2368 and component carrier 4 (k=4) 2342uses power amplifier J (K=4) 2370. Although only several possibleconfigurations are illustrated in FIG. 23D, several other configurationsof power amplifiers may be used between regulated bands and componentcarriers. Thus, FIG. 23D illustrates that if each regulated band and/orcomponent carrier uses separate power amplifiers indicated by separate Kvalues, then each power amplifier provides signal amplification for eachregulated band and/or component carrier.

FIG. 23E is a diagram illustrating yet another example of a plurality ofregulated frequency bands and component carriers. FIG. 23E alsoillustrates several configurations of how UE power classes may beapplied to regulated bands and/or component carriers. The componentcarriers 2336, 2338, 2340, 2342 and regulated bands 2346, 2348, 2350 inFIG. 23E are shown on a frequency scale 2344. Each UE power class mayspecify a maximum transmission power. Each uplink power controlprocedure (e.g., as illustrated in FIG. 17) may be defined by the UEpower class.

In one configuration, UE power class A (K=1) 2372 may be a singledesignated UE power class applied to all of the regulated bands 2346,2348, 2350 and hence, all of the component carriers (k=1-4) 2336, 2338,2340, 2342. In other configurations, multiple UE power classes may bedesignated and/or applied to individual or multiple component carriersand/or regulated bands. In one example, UE power class B (K=1) 2374 isapplied to regulated band 1 2346 (i.e., and hence, to component carrier1 (k=1) 2336 and component carrier 2 (k=2) 2338). Regulated band 2 2348may use UE power class C (K=2) 2376 while regulated band 3 2350 uses UEpower class D (K=3) 2378.

In another configuration, a single UE power class may be applied tomultiple component carriers on separate regulated frequency bands. Forexample, UE power class F (K=2) 2382 may be applied to component carrier3 (k=3) 2340 and component carrier 4 (k=4) 2342, which are separatedbetween regulated band 2 2348 and regulated band 3 2350. UE power classE (K=1) 2380, for example, may be applied to regulated band 1 2346(e.g., and thus component carrier 1 (k=1) 2336 and component carrier 2(k=2) 2338).

In yet another configuration, a separate UE power class may be appliedto each individual component carrier. In this example, component carrier1 (k=1) 2336 uses UE power class G (K=1) 2384, component carrier 2 (k=2)2338 uses UE power class H (K=2) 2386, component carrier 3 (k=3) 2340uses UE power class I (K=3) 2388 and component carrier 4 (k=4) 2342 usesUE power class J (K=4) 2390. Although only several possibleconfigurations are illustrated in FIG. 23E, several other configurationsof UE power classes may be used between regulated bands and componentcarriers. Thus, FIG. 23E illustrates that if each regulated band and/orcomponent carrier uses separate power amplifiers, indicated by separateK values, then a separate UE power class may be applied to eachregulated band and/or component carrier.

Several other configurations may also be used in a similar manner asthat described herein. For example, one power amplifier (e.g., on awireless communication device 104) may support more than one (i.e.,multiple) UE power classes. Conversely, multiple power amplifiers (e.g.,on a wireless communication device 104) may support a single UE powerclass.

FIG. 23F is a flow diagram illustrating another configuration of amethod 2392 a for performing uplink transmission power control for aplurality of regulated frequency bands. For each regulated band used, awireless communication device 104 may determine 2394 a a totaltransmission power for each component carrier and allocate 2396 atransmission power to each antenna accordingly. More specifically, step1 2394 a in FIG. 23F for each of the regulated bands may be the sameprocedure that is carried out in step 1 1702 of FIG. 17 and step 2 2396a in FIG. 23F may be the same procedure carried out in step 2 1704 ofFIG. 17.

Separate K values indicating separate power amplifiers may be used foreach regulated band (e.g., on a wireless communication device),indicating that an individual or separate uplink power control procedure2392 a may be followed for each regulated band. Thus, the UE power classmay be set separately for each regulated frequency band (e.g., asillustrated in FIG. 23E). Furthermore, it should be noted that themaximum transmission power (e.g., as shown in step 1-2 1804 in FIG. 19)may be set separately for each regulated band. This is because themaximum transmission power may be defined by each UE power class that isapplied to each regulated frequency band (e.g., a separate UE powerclass may correspond to each regulated band). For example, the maximumtransmission power may be as discussed above (e.g., 17 dBm or 23 dBm asdiscussed in connection with FIGS. 20-22).

FIG. 23G is a flow diagram illustrating a configuration of a method 2392b for performing uplink transmission power control for a plurality ofcomponent carriers. If separate K values indicating a separate UE poweramplifier is used for each component carrier, the uplink power controlprocedure may be the procedure illustrated in FIG. 23G. A wirelesscommunication device 104 may determine 2394 b a total transmission powerfor the component carrier and allocate 2396 b transmission power to eachantenna 106 accordingly. More specifically, step 1 2394 b in FIG. 23Gfor each of the component carriers may be the same procedure that iscarried out in step 1 1702 of FIG. 17 and step 2 2396 b in FIG. 23F maybe the same procedure carried out in step 2 1704 of FIG. 17. That is, anindividual or separate uplink power control procedure 2392 a may befollowed for each component carrier. Thus, the UE power class may be setseparately for each regulated component carrier (e.g., as illustrated inFIG. 23E). Furthermore, it should be noted that the maximum transmissionpower (e.g., as shown in step 1-2 1804 in FIG. 19) may be set separatelyfor each component carrier (e.g., each “k”). This is because the maximumtransmission power may be defined by each UE power class that is appliedto each component carrier. For example, the maximum transmission powermay be as discussed above, though applied to component carriers (e.g.,where k=K) instead of regulated frequency bands (e.g., 17 dBm or 23 dBmas discussed in connection with FIGS. 20-22).

As illustrated in FIGS. 23F and 23G, each regulated frequency band orcomponent carrier may have a separate individual power controlprocedure. By extension, each power amplifier used on the wirelesscommunication device 104 may also have a separate power controlprocedure.

FIG. 23H is a block diagram illustrating one configuration of a wirelesscommunication device 104 a in which systems and methods for performinguplink transmission power control on a wireless communication device forantenna port mode and transmission mode transitions may be implemented.The wireless communication device 104 a may utilize multiple antennas106 a-b to transmit and receive information.

The wireless communication device 104 a may be implemented to supportmultiple UE power classes 2398. The UE power classes may be defined by aspecification such as the third generation partnership project (3GPP),for example. A UE power class defines a maximum output power for that UEpower class. As discussed above, each UE power class 2398 could beapplied to individual or multiple regulated bands and/or componentcarriers (k). This may enable a wireless communication device 104 a tosupport multiple UE configuration sets 2301. Each configuration set 2317may have its own uplink power control procedure, separated by eachcomponent carrier and/or frequency band and/or power amplifier.

FIG. 23H illustrates several examples of UE configuration sets 2301. AUE configuration set 2317 may generally include one or more UE powerclasses 2398 as applied to one or more regulated bands 2303, 2305, 2307and/or one or more component carriers 2309, 2311, 2313, 2315. A UEconfiguration set 2317 may be used to denote different UE classes (i.e.,not to be confused with UE power classes), UE categories, or UEcapabilities combined with other UE characteristics. Each of theseclasses, categories or capabilities may define varying wirelesscommunication device capabilities (e.g., in terms of data rates orvarying maximum transmission powers). In one example, a UE capability(e.g., capability information) is a diverse set of information. It mayinclude, for example, release information of a UE, UE categoryinformation, UE class information and/or a band list which is supportedby the UE, etc. A UE category or UE class may include the number of UEtransmission antennas supported by the UE and/or the data rate supportedby the UE, etc. In one example, UE categories and UE capabilities may beorganized hierarchically, such that a capability may include categories,etc.

For convenience, in FIG. 23H “UE Configuration Set” has been abbreviatedas “Config Set,” “component carrier” has been abbreviated as “CC,” “UEpower class” has been abbreviated as “PC” and “regulated frequency band”or “frequency chunk” has been abbreviated as “Band” in the table of UEconfiguration sets 2301.

In one example configuration, UE configuration set A 2317 a (i.e.,“Config Set A”) applies the UE power class A (K=1) 2319 a to all of theregulated bands (e.g., Band 1 2303, Band 2 2305, Band 3 2307) andcomponent carriers (e.g., CC 1 2309, CC 2 2311, CC 3 2313, CC 4 2315)utilized by the wireless communication device 104 a. Another example UEconfiguration set B 2317 b applies separate UE power classes to eachband (i.e., power class C (K=1) 2319 c to band 1 2303, power class B(K=2) 2319 b to band 2 2305 and power class A (K=3) 2319 a to band 32307).

In another example configuration, a UE power class is applied tomultiple component carriers in separate bands. That is, UE configurationset C 2317 c applies power class A (K=1) 2319 a to component carrier 12309 and power class C (K=3) 2319 c to component carrier 4 2315, whilepower class E (K=2) 2319E is applied to both component carrier 2 2311which resides in band 1 2303 and component carrier 3 2313 which residesin band 2 2305.

Another UE configuration set may apply separate UE power classes to eachcomponent carrier. That is, UE configuration set D 2317 d applies UEpower class B (K=1) 2319 b to component carrier 1 2309, UE power class B(K=2) 2319 b also to component carrier 2 2311, UE power class D (K=3)2319 d to component carrier 3 2313 and UE power class A (K=4) 2319 a tocomponent carrier 4 2315.

UE Configuration set N 2317 n, for example, applies UE power class A(K=1) 2319 a to component carrier 1 2309 and UE power class C (K=2) 2319c to component carrier 2 2311. UE Configuration set N 2317 n furtherapplies power class A (K=3) 2319 a to both band 2 2305 and band 3 2307.Although only a few example UE configuration sets 2317 are illustratedin FIG. 23H, many other configuration sets 2317 could be used.

The wireless communication device 104 a may include a UE power classreport 2321. This UE power class report 2321 may include a number ofsupported UE power classes 2323 and supported UE power class IDs 2325.For example, assuming that the wireless communication device supports UEpower classes A-E, the number of supported UE power classes 2323 wouldbe 5. The supported UE power class IDs 2325 identifies each of thespecific UE power classes 2398 supported on the wireless communicationdevice 104 a (e.g., A, B, C, D and E). The UE power class report 2321may be sent to a base station 102 (e.g., eNB), for example.

FIG. 23I is a flow diagram illustrating one configuration of a method2300 for performing uplink transmission power control on a wirelesscommunication device 104 for antenna port mode and transmission modetransitions. This method 2300 allows flexibility for operators and UEmanufacturers, where different UE categories or classes can be bundledinto one physical UE by frequency band, component carrier or poweramplifier. Operators and UE manufacturers may thus flexibly createcombinations of different UE classes. Multi-mode wireless communicationdevices may thus be manufactured and deployed, satisfying a varying mixof UE capabilities and operator services.

A wireless communication device 104 may send 2327 a UE power classreport 2321 (e.g., to a base station 102). The wireless communicationdevice 104 may determine 2329 a UE configuration set. For example, awireless communication device 104 could generate a UE configuration set2301 based on performance or commands from a base station 102.Alternatively, the wireless communication device 104 could select a UEconfiguration set 2317 from a table of UE configuration sets 2301.

The wireless communication device 104 may then apply 2331 the UEconfiguration set 2317 to a regulated band or component carrier. The UEconfiguration step (e.g., applying 2331 the UE configuration) may occurless frequently because appropriate UE configurations for a UE which isconnected to a specific operator's network may depend on the UE'sphysical configuration. The wireless communication device 104 maydetermine 2333 P_(MAX) based on each UE power class (e.g., asillustrated in equations (1), (2), or (3) above). Determining 2333P_(MAX) may be similar to determining 1702 the total transmission powerin FIG. 17.

The wireless communication device 104 may determine 2337 whether toapply the UE configuration set 2317 to an additional regulated band orcomponent carrier. If the wireless communication device 104 determines2337 not to apply the UE configuration set 2317 to an additionalregulated band or component carrier (e.g., there are no more regulatedbands or component carrier to which the UE configuration set has notalready been applied), then the method 2300 may end 2339. However, ifthe wireless communication device 104 determines 2337 to apply the UEconfiguration set 2317 to an additional regulated band or componentcarrier, the method 2300 may return to determine 2333 P_(MAX) based oneach power class.

For example, assuming there are two component carriers to which a UEconfiguration set (e.g., two UE power classes) should be applied, afterdetermining 2333 P_(MAX) based on each UE power class, the wirelesscommunication device 104 would determine 2337 that an additional UEpower class in the UE configuration set needs to be applied. Thus, thewireless communication device 104 determines 2333 P_(MAX) for the secondUE power class (e.g., for the second component carrier), and the methodproceeds as before.

In one configuration, the wireless communication device 104 may send2327 the UE power class report 2321 and determine 2329 a UEconfiguration set 2317 only once, at the time of initial access or abase station 102 request. By doing this, the UE configuration (e.g.,which regulated band or component carrier will use which PA) will bedetermined and uplink power control parameters (e.g., P_(MAX) inequations (1), (2), and/or (3)) will be determined. These parameters maybe determined less frequently (e.g., during initial access or when abase station 102 requires an update). The wireless communication device104 may determine 2333 P_(MAX) based on each UE power class. Thewireless communication device 104 may determine 2337 whether theconfiguration set 2317 needs to be applied to another regulated band orcomponent carrier (e.g., the next K) only once or several times (i.e.,once for every uplink transmission). These steps may be carried out atthe time of initial access or a base station 102 request. Once uplinkparameters (e.g. K and/or P_(MAX)) will be determined in these steps,uplink power control procedure (e.g. 2330 a-b in FIG. 23C, 2392 a inFIG. 23F or 2392 b in FIG. 23G) will be carried out at the time of eachuplink transmission.

It should be noted that several of the steps illustrated in FIG. 23I mayalso be performed on a base station 102. For example, a base station 102could determine 2329 a UE configuration set and send a command to thewireless communication device 104 to use the determined UEconfiguration. Furthermore, a base station 102 could determine 2333P_(MAX) based on each UE power class. On the other hand, the UE (i.e.,wireless communication device 104) may choose a configuration set 2317from the table of configuration sets 2301 and report the selectedconfiguration set 2317 to a base station 102.

In SU-MIMO (rank 1) mode 116 c, a wireless communication device 104 mayuse only one antenna 106 physically. It may be said that an antennaturn-off vector is used. When an antenna turn-off vector is used, awireless communication device 104 is assumed to be in the single antennaport mode 114 a. In other words, the same transmission power as shown inFIG. 21 for one antenna 106 a will be allocated. For the remainingantenna 106 b, no power will be allocated.

At least some aspects of the present disclosure relate to a transmissiondiversity implementation allowing both single and multiple antennatransmission schemes. The PUSCH transmission diversity scheme mayinclude two steps: the first step is an open-loop transmission diversityscheme, and the second step is an antenna port weighting process. Theopen-loop transmission diversity scheme may be SFBC (space-frequencyblock coding), STBC (space-time block coding), FSTD (frequency selectivetransmission diversity) or CDD (cyclic delay diversity).

After the open-loop transmission diversity process, there may be anantenna port weighting process. Assuming that SC-FDMA (singlecarrier—frequency diversity multiple access) is used, there may be adiscrete Fourier transform (DFT), an inverse fast Fourier transform(IFFT) and a CP insertion process after the open-loop transmissiondiversity process and the antenna port weighting process. This is thecase for FSTD, as shown in FIG. 24, and for CDD, as shown in FIG. 26.Alternatively, there may be an IFFT and CP insertion process after theopen-loop transmission diversity process and the antenna port weightingprocess. This is the case for SFBC, as shown in FIG. 25.

FIG. 24 illustrates the open-loop transmission diversity schemeimplemented as FSTD. The FSTD open-loop transmission diversity schemeincludes a code block segmentation module 2432, a channel coding module2434, a modulator module 2436, and an antenna segmentation module 2438.The antenna segmentation module 2438 has two outputs. The first outputof the antenna segmentation module 2438 is processed by a first antennaport weighting module 2426 a, a first discrete Fourier transform (DFT)module 2440 a, a first subcarrier mapping module 2442 a, a first inversefast Fourier transform (IFFT) module 2444 a and a first cyclic prefix(CP) insertion module 2446 a. The second output of the antennasegmentation module 2438 is processed by a second antenna port weightingmodule 2426 b, a second DFT module 2440 b, a second subcarrier mappingmodule 2442 b, a second IFFT module 2444 b and a second CP insertionmodule 2446 b.

FIG. 25 illustrates the open-loop transmission diversity schemeimplemented as SFBC. The SFBC open-loop transmission diversity schemeincludes a quadrature amplitude modulation (QAM) module 2548, an M-DFTmodule 2550, a block demultiplexing module 2552, and a space-time codingmodule 2554. The space-time coding module 2554 has two outputs. Thefirst output of the space-time coding module 2554 is processed by afirst antenna port weighting module 2526 a, a first sub-carrier mappingmodule 2542 a, a first N-IDFT (inverse discrete Fourier transform)module 2556 a, and a first CP insertion module 2546 a. The second outputof the space-time coding module 2554 is processed by a second antennaport weighting module 2526 b, a second sub-carrier mapping module 2542b, a second N-IDFT module 2556 b, and a second CP insertion module 2546b.

FIG. 26 illustrates the open-loop transmission diversity schemeimplemented as CDD. The CDD open-loop transmission diversity schemeincludes a code block segmentation module 2632, a channel coding module2634 and a modulator module 2636. The modulator module 2636 has twooutputs. The first output of the modulator module 2636 is processed by afirst antenna port weighting module 2626 a, a first DFT module 2640 a, afirst subcarrier mapping module 2642 a, a first IFFT module 2644 a and afirst CP insertion module 2646 a. The second output of the modulatormodule 2636 is processed by a cyclic delay module 2658, a second antennaport weighting module 2626 b, a second DFT module 2640 b, a secondsubcarrier mapping module 2642 b, a second IFFT module 2644 b, and asecond CP insertion module 2646 b.

As shown in FIG. 27A, an antenna port weighting process 2726 a maymultiply the input signal by x. Alternatively, as shown in FIG. 27B, anantenna port weighting process 2726 b may multiply the input signal by√{square root over (1−x²)}. In either case, x may be any of thefollowing: x={1,sqrt(½), 0}; x={1, sqrt(⅓),sqrt(½), sqrt(⅔),0}; or x={1,sqrt(⅙), sqrt(⅓), sqrt(½), sqrt(⅔), sqrt(⅚), 0}. Either of the antennaport weighting processes 2726 a, 2726 b in FIGS. 27A and 27B may beutilized as the antenna port weighting modules 2426 a, 2426 b, 2526 a,2526 b, 2626 a, 2626 b in FIGS. 24-26. Antenna port weighting may beapplied to both data and the demodulation reference signal (DMRS). Inthe case of two uplink transmit antennas 106 a, 106 b, when x=0 or 1,this implies that it is effectively a single antenna 106 transmission.

A wireless communication device 104 may be configured so that it alwaysuses two antennas 106 a, 106 b when it is in transmit diversity mode 116b. For example, in case two 320 (FIG. 3), transmit diversity mode 116 bbelongs to multiple antenna port mode 114 b only. However, a largeantenna gain imbalance may degrade transmission diversity performance.Moreover, transmit diversity mode 116 b may make battery life shorter.Hence, it may be beneficial for a wireless communication device 104 totransition from the multiple antenna port mode 114 b to the singleantenna port mode 114 a when it is in the transmit diversity mode 116 b.

At least some aspects of the systems and methods disclosed herein relateto switching between single antenna port mode 114 a and multiple antennaport mode 114 b when using transmit diversity mode 116 b. There are atleast three different mechanisms by which this can occur. First, thewireless communication device 104 can autonomously select the value of x(i.e., without any explicit or implicit signaling from the base station102 to the wireless communication device 104). Second, the base station102 may configure x via PDCCH (physical downlink control channel)signaling. Third, the wireless communication device 104 may overwritethe x value that was configured by the base station 102. Allowing theflexibility to transition between single antenna port mode 114 a andmultiple antenna port mode 114 b in transmit diversity mode 116 b mayimprove performance under a large antenna gain imbalance and may alsosave power and hence, may improve the battery performance.

The first mechanism mentioned above is that the wireless communicationdevice 104 may autonomously select the value of x during transmitdiversity mode 116 b. In other words, without any explicit or implicitsignaling from the base station 102 to the wireless communication device104, the wireless communication device 104 may change the value of x. Byapplying an antenna port weighting process 2726 on both data and DMRS,the base station 102 reception process can be made transparent of the xvalue used at the wireless communication device 104. Hence, the wirelesscommunication device 104 can autonomously select the value of x.Moreover, if there is large antenna gain imbalance between antennas 106a, 106 b, this proposed scheme may have performance gain since one canuse all transmission power on one antenna 106 a if the other antenna's106 b gain is too small. Alternatively, when the wireless communicationdevice's 104 battery level is low, one can make battery life longer byusing only one antenna 106 a, i.e., setting the value of x to 1.However, both antenna 106 gain imbalance and wireless communicationdevice 104 battery level may be known only at the wireless communicationdevice 104. So it may be beneficial for the wireless communicationdevice 104 to allow autonomous x value selection.

Based on pathloss information or the wireless communication device's 104battery level (which may be measured on the wireless communicationdevice 104 side through downlink reference signal reception), thewireless communication device 104 may select x autonomously. Forexample, when the wireless communication device 104 measures thedownlink reference signal and notices the large antenna gain imbalance(or large pathloss difference), the wireless communication device 104may set the value of x to 1 without any signaling to the base station102. As another example, when the wireless communication device 104measures the battery level and notices the battery level is low, thewireless communication device 104 may set the value of x to 1 withoutany signaling to the base station 102.

On the other hand, if the base station 102 can estimate the uplinkchannel and antenna gain imbalance (e.g., via channel estimationemploying channel reciprocity or feedback from the wirelesscommunication device 104) or the battery status at the wirelesscommunication device 104, the base station 102 can configure the valueof x to be used at the wireless communication device 104 and hence thenetwork can avoid unexpected behavior by the wireless communicationdevice 104.

The PDCCH may include the antenna port weighting bit explicitly. Forexample, if x={1,sqrt(½), 0}, at least two bits may be needed toindicate the x value to the wireless communication device 104. The PDCCHmay carry two bits to indicate the x value to the wireless communicationdevice 104. Another solution may be for the PDCCH to include the antennaport weighting bit implicitly. For example, an identifier for thewireless communication device 104 can be masked with implicit signalingthat stands for x indexes as shown in FIG. 28.

The base station 102 may select the value of x based on pathlossinformation that is reported from the wireless communication device 104(e.g., reference signal received power). Alternatively, the base station102 may select the value of x based on pathloss information that ismeasured on the base station 102 side through SRS reception. In eithercase, the base station 102 may configure x via PDCCH.

The wireless communication device 104 may overwrite the value of x thatwas configured by the base station 102. In the event that the wirelesscommunication device 104 overwrites the configured x value sent by thebase station 102 over the PDCCH, there may be a need for the wirelesscommunication device 104 to signal to the base station 102 the choice ofthe x value. This may be accomplished with PUSCH 108 transmission. Forexample, as shown in FIG. 29, the wireless communication device 104 maysend PUSCH 108 and PUCCH 110 a, 110 b at the same subframe, and thePUCCH 110 a may carry the x value that is used in PUSCH 108transmission. As another example, the PUSCH 108 may carry the x value3028 as control information as shown in FIG. 30. The symbol andsubcarriers that carry the x value 3028 may use a pre-defined x value3028 (for example, “x=1”), and the remaining parts may be decodedassuming the “received x value” is used for them. As another example, asshown in FIG. 31, the CRC 3030 in the PUSCH 108 may be masked by the “xvalue” 3028. In this case, the base station 102 may decode the receivedPUSCH 108 multiple times by trying multiple x values 3028 as aparameter.

If the base station 102 detects that the wireless communication device104 transitioned to single antenna port mode 114 a autonomously by anestimated “x value” via PUSCH 108 reception, the base station 102 mayconsider that the wireless communication device 104 has autonomouslytransitioned from multiple antenna port mode 114 b to single antennaport mode 114 a.

FIG. 32 illustrates various components that may be utilized in awireless communication device 3204. The wireless communication device3204 may be utilized as the wireless communication device 104 in FIG. 1.The wireless communication device 3204 includes a processor 3296 thatcontrols operation of the wireless communication device 3204. Theprocessor 3296 may also be referred to as a CPU. Memory 3288, which mayinclude both read-only memory (ROM), random access memory (RAM) or anytype of device that may store information, provides instructions 3289 aand data 3290 a to the processor 3296. A portion of the memory 3288 mayalso include non-volatile random access memory (NVRAM). Instructions3289 b and data 3290 b may also reside in the processor 3296.Instructions 3289 b loaded into the processor 3296 may also includeinstructions 3289 a from memory 3288 that were loaded for execution bythe processor 3296. The instructions 3289 b may be executed by theprocessor 3296 to implement the methods disclosed herein.

The wireless communication device 3204 may also include a housing thatcontains a transmitter 3292 and a receiver 3293 to allow transmissionand reception of data. The transmitter 3292 and receiver 3293 may becombined into a transceiver 3297. An antenna 3298 is attached to thehousing and electrically coupled to the transceiver 3297. Additionalantennas may also be used.

The various components of the wireless communication device 3204 arecoupled together by a bus system 3291 which may include a power bus, acontrol signal bus, and a status signal bus, in addition to a data bus.However, for the sake of clarity, the various buses are illustrated inFIG. 32 as the bus system 3291. The wireless communication device 3204may also include a digital signal processor (DSP) 3294 for use inprocessing signals. The wireless communication device 3204 may alsoinclude a communications interface 3295 that provides user access to thefunctions of the communication device 3302 (e.g., the base station 3302as illustrated in FIG. 33). The wireless communication device 3204illustrated in FIG. 32 is a functional block diagram rather than alisting of specific components.

FIG. 33 illustrates various components that may be utilized in a basestation 3302. The base station 3302 may be utilized as the base station102 in FIG. 1. The base station 3302 may include components that aresimilar to the components discussed above in relation to the wirelesscommunication device 3304, including a processor 3396, memory 3388 thatprovides instructions 3389 a and data 3390 a to the processor 3396,instructions 3389 b and data 3390 b that may reside in the processor3396, a housing that contains a transmitter 3392 and a receiver 3393(which may be combined into a transceiver 3397), an antenna 3398electrically coupled to the transceiver 3397, a bus system 3391, a DSP3394 for use in processing signals, a communications interface 3395, andso forth.

The term “computer-readable medium” refers to any available medium thatcan be accessed by a computer or a processor. By way of example, and notlimitation, a computer-readable medium may comprise RAM, ROM, EEPROM,CD-ROM or other optical disk storage, magnetic disk storage or othermagnetic storage devices, or any other medium that can be used to carryor store desired program code in the form of instructions or datastructures and that can be accessed by a computer or a processor. Diskand disc, as used herein, includes compact disc (CD), laser disc,optical disc, digital versatile disc (DVD), floppy disk and Blu-ray®disc where disks usually reproduce data magnetically, while discsreproduce data optically with lasers.

Each of the methods disclosed herein comprises one or more steps oractions for achieving the described method. The method steps and/oractions may be interchanged with one another without departing from thescope of the claims. In other words, unless a specific order of steps oractions is required for proper operation of the method that is beingdescribed, the order and/or use of specific steps and/or actions may bemodified without departing from the scope of the claims.

It is to be understood that the claims are not limited to the preciseconfiguration and components illustrated above. Various modifications,changes and variations may be made in the arrangement, operation anddetails of the systems, methods, and apparatus described herein withoutdeparting from the scope of the claims.

What is claimed is:
 1. A wireless communication device comprising: atransmitting unit configured to transmit one or more physical uplinkshared channels (PUSCHs) on one or more uplink component carriers; andan uplink power control unit configured to determine a transmissionpower for physical uplink shared channel (PUSCH) for each componentcarrier, wherein the transmission power for PUSCH for each componentcarrier is obtained by scaling a projected transmission power for thePUSCH in a case that a sum of projected values exceeds a maximumtransmission power of the wireless communication device, wherein the sumof projected values is a sum of projected PUSCH transmission powers forcomponent carriers and projected physical uplink control channel (PUCCH)transmission power, and wherein the maximum transmission power of thewireless communication device is defined based on a user equipment (UE)power class of the wireless communication device.
 2. The wirelesscommunication device of claim 1, further comprising: a plurality oftransmission antenna ports; a scaling unit configured to scale thetransmission power for the PUSCH for each component carrier to generatethe scaled transmission power for each component carrier; and anallocating unit configured to allocate the scaled transmission power foreach component carrier to be split equally across the transmissionantenna ports where one or more PUSCHs are transmitted.
 3. The wirelesscommunication device of claim 1, wherein the uplink power control unitconfigured to determine a transmission power for physical uplink controlchannel (PUCCH), wherein the transmission power for the PUSCH for eachcomponent carrier is scaled to zero and the transmission power for PUCCHis not scaled in the case that the sum of projected values exceeds themaximum transmission power of the wireless communication device.
 4. Amethod performed by a wireless communication device, comprising:transmitting one or more physical uplink shared channels (PUSCHs) on oneor more uplink component carriers; and determining a transmission powerfor a physical uplink shared channel (PUSCH) for each component carrier,wherein the transmission power for the PUSCH for each component carrieris scaled from a projected transmission power for the PUSCH in a casethat a sum of projected values exceeds a maximum transmission power ofthe wireless communication device, wherein the sum of projected valuesis a sum of projected PUSCH transmission powers for component carriersand projected physical uplink control channel (PUCCH) transmissionpower, and wherein the maximum transmission power of the wirelesscommunication device is defined based on a user equipment (UE) powerclass of the wireless communication device.
 5. The method of claim 4,further comprising: scaling the determined transmission power for thePUSCH for each component carrier to generate the scaled transmissionpower for each component carrier; and allocating the scaled transmissionpower for each component carrier to be split equally across a pluralityof transmission antenna ports where one or more PUSCHs are transmitted.6. The method of claim 4, further comprising: determining a transmissionpower for physical uplink control channel (PUCCH), wherein thetransmission power for the PUSCH for each component carrier is scaled tozero and the transmission power for the PUCCH is not scaled in the casethat the sum of projected values exceeds the maximum transmission powerof the wireless communication device.